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All results from a given calculation for CH3SiH3 (methyl silane)

using model chemistry: mPW1PW91/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A1
Energy calculated at mPW1PW91/6-311G**
 hartrees
Energy at 0K-331.225414
Energy at 298.15K-331.220171
Nuclear repulsion energy62.720751
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at mPW1PW91/6-311G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3060 2928 4.92      
2 A1 2229 2133 65.24      
3 A1 1297 1241 18.85      
4 A1 943 902 225.01      
5 A1 703 673 10.24      
6 A2 196 187 0.00      
7 E 3146 3010 7.29      
7 E 3146 3010 7.29      
8 E 2231 2134 136.93      
8 E 2231 2134 136.97      
9 E 1466 1403 5.20      
9 E 1466 1403 5.20      
10 E 961 919 41.47      
10 E 961 919 41.47      
11 E 893 854 71.29      
11 E 893 854 71.29      
12 E 522 499 9.81      
12 E 522 499 9.81      

Unscaled Zero Point Vibrational Energy (zpe) 13432.0 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 12850.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at mPW1PW91/6-311G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.243
Si2 0.000 0.000 0.634
H3 0.000 -1.020 -1.633
H4 -0.884 0.510 -1.633
H5 0.884 0.510 -1.633
H6 0.000 1.393 1.160
H7 -1.206 -0.696 1.160
H8 1.206 -0.696 1.160

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.87761.09191.09191.09192.77782.77782.7778
Si21.87762.48582.48582.48581.48881.48881.4888
H31.09192.48581.76721.76723.69063.05903.0590
H41.09192.48581.76721.76723.05903.05903.6906
H51.09192.48581.76721.76723.05903.69063.0590
H62.77781.48883.69063.05903.05902.41252.4125
H72.77781.48883.05903.05903.69062.41252.4125
H82.77781.48883.05903.69063.05902.41252.4125

picture of methyl silane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 Si2 H6 110.678 C1 Si2 H7 110.678
C1 Si2 H8 110.678 Si2 C1 H3 110.875
Si2 C1 H4 110.875 Si2 C1 H5 110.875
H3 C1 H4 108.031 H3 C1 H5 108.031
H4 C1 H5 108.031 H6 Si2 H7 108.238
H6 Si2 H8 108.238 H7 Si2 H8 108.238
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.665      
2 Si 0.559      
3 H 0.152      
4 H 0.152      
5 H 0.152      
6 H -0.117      
7 H -0.117      
8 H -0.117      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.765 0.765
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.950 0.000 0.000
y 0.000 -22.950 0.000
z 0.000 0.000 -23.193
Traceless
 xyz
x 0.122 0.000 0.000
y 0.000 0.122 0.000
z 0.000 0.000 -0.243
Polar
3z2-r2-0.487
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.369 0.000 0.000
y 0.000 5.369 0.000
z 0.000 0.000 5.970


<r2> (average value of r2) Å2
<r2> 50.267
(<r2>)1/2 7.090